AirHint found the following cheapest return flights from Sao Paulo (GRU) to Porto (OPO) in August 2025 (see full year).

Return flights

12 Aug - 28 Aug	Iberia
12 Aug - 27 Aug	Iberia
05 Aug - 09 Sep	Iberia
10 Aug - 11 Sep	Iberia
13 Aug - 16 Sep	Iberia
09 Aug - 09 Sep	Iberia
05 Aug - 12 Aug	Air China
11 Aug - 26 Aug	Iberia
05 Aug - 08 Sep	Iberia
14 Aug - 17 Sep	Iberia
05 Aug - 19 Aug	Air China
05 Aug - 23 Aug	Iberia
12 Aug - 19 Aug	Iberia
02 Aug - 03 Sep	Iberia
12 Aug - 22 Aug	Iberia
09 Aug - 04 Sep	Iberia
12 Aug - 25 Sep	Iberia
04 Aug - 09 Sep	Iberia
10 Aug - 22 Aug	Iberia
09 Aug - 23 Aug	Iberia

Also check the deals for one-way flights from Sao Paulo to Porto in August.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Sao Paulo to Porto in August from $728

Return flights